Web Call for Conv Cell?

Right now, I am using the web call to get a JSON for the cell structure, but the web call gives the format as a primitive cell.
I know that I can use python to convert primitive to conventional, but I am creating a program for people who most likely only have matlab installed, not python, so a web call for a JSON seems to be the best way to make it usable.

I need the conventional, but the converter using python isn’t going to be available to most of the users. Is there someway to get the conventional cell from the web call?
I am pretty new at using APIs and python btw!